Not at the concentrations that are used. The amount of residue is minuscule and modern pesticides have far less toxicity than older ones that have been phased o

Not at the concentrations that are used. The amount of residue is minuscule and modern pesticides have far less toxicity than older ones that have been phased out. So now you give some qualifications to your earlier statement. Do note that modern pesticides are not in widespread use all over the world (cost). Modern pesticides applied by a well educated professional can have a relatively low impact on the environment. But there are a lot of poorly educated farmers out there (most of them, really), and that doesn't begin to address the abuse of pesticides by lawn care companies and homeowners.